Note 7 - Loans and Allowance for Loan Losses - Recorded Investment in Nonperforming Loans by Class of Loans (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Real Estate Portfolio Segment [Member] \| Real Estate Construction and Land Development [Member]
Nonaccrual	$ 1,023,000	$ 1,567,000
Restructured Loans	3,660,000	3,674,000
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Residential [Member]
Nonaccrual	2,268,000	2,485,000
Restructured Loans	4,073,000	4,127,000
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Farmland and Other Commercial Enterprises [Member]
Nonaccrual	3,034,000	4,266,000
Restructured Loans	15,192,000	15,503,000
Loans Past Due 90 Days or More and Still Accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Nonaccrual	59,000	44,000
Restructured Loans	380,000	384,000
Loans Past Due 90 Days or More and Still Accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial Other [Member]
Nonaccrual	6,000	8,000
Restructured Loans	0	0
Loans Past Due 90 Days or More and Still Accruing	0	0
Consumer Portfolio Segment [Member] \| Consumer Secured [Member]
Nonaccrual	7,000	10,000
Restructured Loans	0	0
Loans Past Due 90 Days or More and Still Accruing	0	0
Consumer Portfolio Segment [Member] \| Consumer Unsecured [Member]
Nonaccrual	0	0
Restructured Loans	139,000	143,000
Loans Past Due 90 Days or More and Still Accruing	2,000	0
Nonaccrual	6,397,000	8,380,000
Restructured Loans	23,444,000	23,831,000
Loans Past Due 90 Days or More and Still Accruing	$ 2,000	$ 0

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

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